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接地制 : 33 phrases in 11 subjects |
| Automobiles | 4 |
| Aviation | 3 |
| Compressors | 1 |
| Electric machinery | 2 |
| Electronics | 5 |
| General | 1 |
| Geophysics | 1 |
| Space | 1 |
| Technology | 7 |
| Telecommunications | 7 |
| United Nations | 1 |
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